Anovulatory Chart?

I realize I missed a lot of days of charting. Got really burnt out on TTC for a minute honestly. AF is due tomorrow though and I'm having no normal period symptoms and negative pregnancy tests. Had a + strip and digital OPK on 9/19 but is it possible I didn't ovulate or ovulated late? So confused. New to the BBT charts and having a hard time understanding how to read them for some reason.